County annual report · FIPS 24031
2023 Montgomery County, MD Power Outage Report
In 2023, customers in Montgomery County, MD went without power for an average of 2.9 hours, a total of 1.2M customer-hours (Maryland average 3.6 hours). That ranks 10th worst of 24 Maryland counties and 1981st of 2,977 nationally.
Compared with MD, the US and 2022
Coverage line is EAGLE-I's share of Maryland customers tracked each year.
Biggest outages in Montgomery County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 27, 2023 12:45 | August 3, 2023 06:30 | 6d 17h | 55,999 | 707K |
| 2 | June 25, 2023 20:30 | June 28, 2023 06:00 | 2d 9h | 37,874 | 15K |
| 3 | September 27, 2023 11:15 | September 29, 2023 00:45 | 1d 13h | 9,889 | 3,300 |
| 4 | September 20, 2023 12:30 | September 21, 2023 00:45 | 12h 15m | 9,710 | 3,915 |
| 5 | December 18, 2023 03:00 | December 20, 2023 01:30 | 1d 22h | 5,524 | 26K |
| 6 | March 31, 2023 13:45 | April 4, 2023 00:15 | 3d 10h | 4,061 | 21K |
| 7 | November 10, 2023 09:45 | November 11, 2023 03:15 | 17h 30m | 3,630 | 1,866 |
| 8 | August 6, 2023 19:30 | August 10, 2023 05:15 | 3d 9h | 3,349 | 19K |
| 9 | January 31, 2023 09:45 | February 1, 2023 09:45 | 1d | 3,307 | 1,483 |
| 10 | September 22, 2023 12:15 | September 26, 2023 09:45 | 3d 21h | 2,801 | 17K |
Outage episodes by size in 2023: 192 reached 100+ customers, 46 reached 1,000+ customers, 2 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Montgomery County reported on EIA Form 861 for 2023, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| The Potomac Edison Company | 2023 | 3.5 hrs | 1.11 | 2.5 hrs | 0.98 |
| Baltimore Gas & Electric Co | 2023 | 3.2 hrs | 0.96 | 60 min | 0.69 |
| Potomac Electric Power Co | 2023 | 87 min | 0.52 | 39 min | 0.41 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Maryland's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 395,748 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Montgomery County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Montgomery County, MD annual power outage report, 2023, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2023/maryland/montgomery-county